Business trip is a form of a trip on which an employer sends its employee so he could carry out a specific job of maximum duration of 30 days. During a business trip certain expenses are being made, therefore a calculation of that expenses has to be made when the employee returns from the trip and he needs to enclose credible documents so he can justify the expenses made on that trip. Furthermore fulfillment of certain documents is required by the Law such as: the calculation of the travel order, JOPPD form and to enter up the changes that were made. In this paper the differences between business trips to inland and abroad locations are shown, as well as examples of that specific trips, how to calculate a travelling order, calculation of per diem, JOPPD form, and how to enter up all this changes in both cases of a business trip. Entering up expenses that were made on a business trip is somehow different when it comes to a nonprofit organizations because of the accounts that need to be charged or whether the organization is sending their own employee or an employee of another organization/company. In the last couple of years the laws regarding the topic of business trips were changed a lot so in regard to that in this paper only the latest laws that were put into effect in 2017. were used. Some tax free charges were mentioned such as: per diem for field work, the maritime supplement, loco ride but they were not explained in greater detais. The main purpose of this paper is to explain how the business trip works in accounting sense and to back that up with laws and all of the forms that the Law demands but in greater detail.